The beautifully made CNC aluminum adapters are designed to adapt folding propellers to T-Style or direct mount motors. The Adapters can handle a range or blades from 13~17inch props, and help make larger Multirotor a little easier to transport, folding back towards the boom arms much like transporting an RC helicopter. Mounting uses the standardized 12mm center to center with a 4mm center shaft. The adapters are suitable for any motors that are designed for the range of propeller blades available. Four colors are available to aid in rotation identification.